Sgnl, the band that turns your finger into a phone, will ship in March

At last year's CES we got our finger on Sgnl, a smart strap born from Samsung's C-Lab that lets you take calls with your fingertip. It's a hearable, but not one you actually put in your ears.

Sgnl uses bone conduction technology to transmit sound from the band around your wrist, up through your hand and finger, into your ear. It's pretty cool, and at the team have confirmed the strap will ship in March, first to Kickstarter backers and then followed by a wider launch.

Since last year, they've been tweaking the sound performance to make it sharper and block out more of the outside buzz. It sounded good in our short demo, but we didn't get to take a call on it - that will be the real test.

Phone calls are its primary purpose, but you'll also be able to hear notifications or use it to watch a video. You probably won't use it for listening to music, unless you want to draw a lot of strange glances as you go about your day with a finger lodged in your ear.

There's a microphone inside the band so you'll be able to talk back to the person you're on a call with, or speak to your personal assistant. Speaking of the band, it's actually a smart watch strap that will be able to fit any watches that support 22mm bands. But if you'd rather just wear it as a band, you can, it'll just look like a generic fitness tracker.

The band will cost $249 when it launches in March. Battery life can run for a maximum of four days, but just under four hours of active use. Fear not, we'll be bringing you a full review before long.